As a professional pet sitter, I can't tell you how many times people say the following things the first time I speak to them on the phone: "Do you take care of big dogs? I hope you don't charge extra."
"Sweetie is a Rottweiler, but she's really nice...she's never bitten anyone...she loves kids...you'll love her..."
"He's a Chihuahua, so he's little. So you don't charge as much, right?"
"She's a Golden Retriever. She's a lover, and she'll be super easy."
And my all-time favorite "Do you sit for Pit Bulls?"
I always provide the same answer: "I don't discriminate based on size or breed. Every dog deserves the same amount of attention and love. I won't take care of a dog that shows hostility toward me, regardless of the breed or size, and I take wonderful care of all animals that will let me, regardless of the breed or size. There is no difference in price."
Sure, Goliath's poop is HUGE, but that's not his fault. I'll pick up his, and I'll pick up Chi-chi's, just the same.
I have slept in bed with many a Pit Bull's tongue in my face (in a good way) and I've been barked out of town by a Golden Retriever. I have learned through experience not to prejudge the animal. I greet each animal with the energy that is appropriate for the energy he shows me, whether that be positive or negative, big or small. Just like people, dogs are individuals and deserve the right to shine (or not).
So let's judge them, but let's judge them fairly after getting to know them. Just as most of us refuse to judge our human friends by their color or size, might we do the same for dogs? My motto: assume the best, but be prepared for the worst. I apply that to everyone I meet.
Hi! It's nice to meet you...